Patent US3923747A successfully refreshed from Google Patents.
US3923747A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Poly(caprolactone)based polyurethanes having improved blocking characteristics
Assignee: Goodrich Corp
•
Filing: 1973-11-23
•
Granted: 1975-12-02
•
Expires: 1993-11-23
Abstract
Abstract Improved polyurethanes having high tensile strength and modulus, good light stability, good blocking characteristics and that are soluble in inexpensive solvents are obtained by reacting together a hydroxyl-terminated polyester, a poly(epsiloncaprolactone)diol, an aliphatic diol containing at least 5 carbon atoms, a hydroxyl-terminated dimethyl polysiloxane and an acyclic or alicyclic diisocyanate.
Inventors
- 👤 Edmond G Kolycheck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:47
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/758; C08G18/28; C08G18/40; C08G18/4009; C08G18/42; C08G18/4202; C08G18/61
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
130 words
A POLYURETHANE COMPRISING THE REACTION PRODUCT OF A HYDROXY-TERMINATED POLYESTER OF A DICARBOXYLIC ACID AND A GLYCOL, SAID POLYESTER HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 600 TO 1200, A POLY(EPSILON-CAPROLACETONE)DIOL HAVING A MOLECULAR WEIGHT FROM ABOUT 400 TO 600, AN ALIPHATIC DIOL CONTAINING ABOUT 5 TO 10 CARBON ATOMS, ALL WHEN MIXED TOGETHERF HAVING A BLEND AVERAGE MOLECULAR WEIGHT OF BETWEEN ABOUT 350 TO 500, FROM ABOUT 0.005 TO 0.5 MOL OF HYDROXYL-TERMINATED DIMETHYLPOLYSILOXANE HAVNG A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 500 TO ABOUT 3000, A D20/4 OF ABOUT 1 AND CONTAINING ABOUT 2 TO 4 WEIGHT PERCENT HYDROXYL GROUPS PER MOL OF POLYESTER AND AN ACYCLIC OR ALICYCLIC DIISOCYANATE CONTAINING GREATER THAN 6 CARBON ATOMS PRESENT IN AMOUNTS SUBSTANTIALLY EQUIVALENT TO THE HYDROXYL-TERMINATED MATERIALS.
Claim 2
Dependent Claim
130 words
A POLYURETHANE COMPRISING THE REACTION PRODUCT OF A HYDROXY-TERMINATED POLYESTER OF A DICARBOXYLIC ACID AND A GLYCOL, SAID POLYESTER HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 600 TO 1200, A POLY(EPSILON-CAPROLACETONE)DIOL HAVING A MOLECULAR WEIGHT FROM ABOUT 400 TO 600, AN ALIPHATIC DIOL CONTAINING ABOUT 5 TO 10 CARBON ATOMS, ALL WHEN MIXED TOGETHERF HAVING A BLEND AVERAGE MOLECULAR WEIGHT OF BETWEEN ABOUT 350 TO 500, FROM ABOUT 0.005 TO 0.5 MOL OF HYDROXYL-TERMINATED DIMETHYLPOLYSILOXANE HAVNG A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 500 TO ABOUT 3000, A D20/4 OF ABOUT 1 AND CONTAINING ABOUT 2 TO 4 WEIGHT PERCENT HYDROXYL GROUPS PER MOL OF POLYESTER AND AN ACYCLIC OR ALICYCLIC DIISOCYANATE CONTAINING GREATER THAN 6 CARBON ATOMS PRESENT IN AMOUNTS SUBSTANTIALLY EQUIVALENT TO THE HYDROXYL-TERMINATED MATERIALS.
Claim 3
Dependent Claim
60 words
A polyurethane of claim 1 wherein the polyester is a polyester of a dicarboxylic acid of the formula HOOC(CH2)xCOOH wherein x is a number from 2 to 10, a glycol of the formula HO(CH2)xOH wherein x is 2 to 10, the aliphatic diol contains 5 to 8 carbon atoms and terminal hydroxyl groups and the diisocyanate is an alicyclic diisocyanate.
Claim 4
Dependent Claim
42 words
A composition of claim 2 wherein in the polyester in the acid x is 2 to 5, in the glycol x is 4 to 8, and the hydroxyl-terminated dimethylpolysiloxane has a molecular weight in the range of about 1200 to about 2200.
Claim 5
Dependent Claim
106 words
A polyurethane of claim 3 wherein in the polyester the acid is adipic acid, in the diol x is 4 to 5, the aliphatic glycol is hexamethylenediol-1,6, the blend average molecular weight is about 400 to about 475, there is about 0.01 to about 0.2 mol of hydroxyl-terminated dimethyl polysiloxane having a molecular weight in the range of about 1200 to about 2200 and having a terminal hydroxyl content of about 3%, the alicyclic diisocyanate is 4,4''-methylenebis(cyclohexyl isocyanate) and the molar ratio of reactants is about one mol of polyester, at least 0.5 mol of poly(epsilon-caprolactone)diol and there is greater than about 1.5 mols of hexanediol-1,6.
Claim 6
Dependent Claim
75 words
A polyurethane of claim 4 wherein the molecular weight of the polyester is about 850 to 1050, the molecular weight of the lactonediol is about 450 to 550 present in amount of about 0.5 to 1.5 mols per mol of polyester, there is about 0.01 to 0.2 mols of hydroxyl-terminated dimethylpoly siloxane per mol of polyester, there is up to about 5 mols of hexanediol-1,6 and the reaction product is substantially free of isocyanate groups.
References Cited (Backward Citations)
US3591561A
Cited
US3806473A
Cited
US3666724A
Cited
US3660357A
Cited
US3741918A
Cited
US3775354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |